U.S. patent application number 13/068499 was filed with the patent office on 2011-11-17 for quick release hub assembly.
Invention is credited to Raphael Schlanger.
Application Number | 20110278912 13/068499 |
Document ID | / |
Family ID | 44741246 |
Filed Date | 2011-11-17 |
United States Patent
Application |
20110278912 |
Kind Code |
A1 |
Schlanger; Raphael |
November 17, 2011 |
Quick release hub assembly
Abstract
A quick release hub assembly, comprising a stationary axle
element with a first outer face and an axially opposed second outer
face and an opening that extends axially between the first outer
face and the second outer face, a rotatable hub shell element that
is rotatable about the axle element and a quick release skewer
assembly that includes a first skewer element with a first gripping
face and a first collar portion extending axially inboard of the
gripping face and a second skewer element with a second gripping
face and a skewer shaft connecting the first skewer element and the
second skewer element. The first gripping face is axially opposed
and facing the second gripping face and the axial distance between
the first gripping face and the second gripping face is selectively
variable. The first gripping face is axially outboard the first
outer face and the second gripping face is axially outboard the
second outer face and the quick release skewer assembly extends
through the opening. The first skewer element is connected to the
skewer shaft by means of a connection at a location that is axially
inboard of the first gripping face. Preferably including a frame
with a frame element with first and second mounting portions, where
the first collar portion includes locating geometry to provide
radially positioning alignment with the first mounting portion.
Inventors: |
Schlanger; Raphael; (Wilton,
CT) |
Family ID: |
44741246 |
Appl. No.: |
13/068499 |
Filed: |
May 12, 2011 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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61395509 |
May 14, 2010 |
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Current U.S.
Class: |
301/124.2 |
Current CPC
Class: |
B62K 25/02 20130101;
B62K 2206/00 20130101; B60B 27/026 20130101 |
Class at
Publication: |
301/124.2 |
International
Class: |
B60B 35/00 20060101
B60B035/00; B60B 27/02 20060101 B60B027/02 |
Claims
1. A quick release hub assembly, comprising: a stationary axle
element including an axial axis, a first outer face and a second
outer face axially spaced and opposed to said first outer face, and
including an axially extending opening therethrough that extends
between said first outer face and said second outer face; a
rotatable hub shell element that is rotatable about said axle
element; a quick release skewer assembly including a first skewer
element with a first gripping face, a second skewer element with a
second gripping face, and a skewer shaft connecting said first
skewer element and said second skewer element; wherein said first
gripping face is axially opposed and facing said second gripping
face; wherein said first gripping face is axially outboard said
first outer face and said second gripping face is axially outboard
said second outer face; wherein said quick release skewer assembly
extends through said opening; wherein the axial distance between
said first gripping face and said second gripping face is
selectively variable; wherein said first skewer element includes a
first collar portion that extends axially inboard of said first
gripping face; and wherein said first skewer element is connected
to said skewer shaft by means of a connection at a connection
location that is axially inboard of said first gripping face.
2. A quick release hub assembly according to claim 1, including a
frame element that includes first and second mounting portions for
mounting of said axle element; wherein said first mounting portion
is axially spaced from said second mounting portion; wherein said
first and second mounting portions each include an axially inboard
clamping face and an axially outboard clamping face; and wherein
said first mounting portion is positioned between said first
gripping face and said first outer face and said second mounting
portion is positioned between said second gripping face and said
second outer face.
3. A quick release hub assembly according to claim 1, wherein said
quick release skewer assembly includes means to provide selective
axial control wherein the axial distance between said first
gripping face and said second gripping face is selectively
controlled such that in a "closed" selective position, said first
inner face and said second inner face are axially contracted and in
an "open" selective position, said first inner face and said second
inner face are axially expanded.
4. A quick release hub assembly according to claims 2 and 3,
wherein in said "closed" selective position said first mounting
portion is axially gripped between said first gripping face and
said first outer face and said second mounting portion is axially
gripped between said second gripping face and said second outer
face; and wherein in an "open" selective position, said first
mounting portion is axially released between said first gripping
face and said first outer face and said second mounting portion is
axially released between said second gripping face and said second
outer face.
5. A quick release hub assembly according to claim 3 or 4, wherein
said means to provide selective axial control is a cam and follower
engagement.
6. A quick release hub assembly according to claim 3 or 4, wherein
said means to provide selective axial control is a threaded
engagement.
7. A quick release hub assembly according to claim 1, wherein said
second skewer element is connected to said skewer shaft by means of
a second connection at a connection location that is axially
inboard of said second gripping face.
8. A quick release hub assembly according to claim 7, wherein said
second connection includes a threaded engagement.
9. A quick release hub assembly according to claim 1, wherein said
first skewer element is connected to said skewer shaft by means of
a longitudinal engagement that extends longitudinally over an axial
distance and wherein at least a portion of said longitudinal
engagement extends to a connection location that is axially inboard
of said first gripping face.
10. A quick release hub assembly according to claim 9, wherein said
longitudinal engagement is a threaded engagement.
11. A quick release hub assembly according to claim 1, wherein said
connection location is axially inboard of said first outer
face.
12. A quick release hub assembly according to claim 11, wherein
said first skewer element is connected to said skewer shaft by
means of a helical thread engagement at said connection
location.
13. A quick release hub assembly according to claims 3 and 10,
wherein said threaded engagement is functional to selectively
control the axial spacing between said first gripping face and said
second gripping face.
14. A quick release hub assembly according to claim 10, wherein
said threaded engagement is an axially fixed threaded
engagement.
15. A quick release hub assembly according to claim 10, wherein
said threaded engagement comprises internal threads of said first
skewer element threadably engaged to external threads of said
skewer shaft.
16. A quick release hub assembly according to claim 15, wherein
said internal threads extend through said first skewer element.
17. A quick release hub assembly according to claim 15, wherein
said internal threads extend in a blind hole of said first skewer
element.
18. A quick release hub assembly according to claim 10, wherein
said threaded engagement comprises external threads of said first
skewer element threadably engaged to internal threads of said
skewer shaft.
19. A quick release hub assembly according to claim 9, wherein said
longitudinal engagement is a crimped or swaged engagement.
20. A quick release hub assembly according to claim 1, wherein at
least a portion of said first skewer element includes a configured
surface to facilitate manual manipulation.
21. A quick release hub assembly according to claim 1, wherein at
least a portion of said skewer shaft has a cross sectional area
between 10 and 35 square millimeters.
22. A quick release hub assembly, comprising: a stationary axle
element including an axial axis, a first outer face and a second
outer face axially spaced and opposed to said first outer face, and
including an axially extending opening therethrough that extends
between said first outer face and said second outer face; a
rotatable hub shell element that is rotatable about said axle
element; a quick release skewer assembly including a first skewer
element with a first gripping face, a second skewer element with a
second gripping face, and a skewer shaft connecting said first
skewer element and said second skewer element; a frame element that
includes a first and second mounting portions for mounting of said
axle element; wherein said first mounting portion is axially spaced
from said second mounting portion; wherein said first and second
mounting portions each include an axially inboard clamping face and
an axially outboard clamping face; wherein said first gripping face
is axially opposed and facing said second gripping face; wherein
said first gripping face is axially outboard the outboard clamping
face of said first mounting portion and said second gripping face
is axially outboard the outboard clamping face of said second
mounting portion; wherein said quick release skewer assembly
extends through said opening; wherein the axial distance between
said first gripping face and said second gripping face is
selectively variable; wherein said quick release skewer assembly
includes a first collar portion that extends axially inboard of
said first gripping face; and wherein said first collar portion
includes locating geometry to provide radially positioning
alignment with said first mounting portion.
23. A quick release hub assembly according to claim 22, wherein
said first collar portion extends axially inboard of said first
outer face.
24. A quick release hub assembly according to claim 23, wherein
said first collar portion extends to axially, overlap said opening
of said axle element.
25. A quick release hub assembly according to claim 22, wherein
said first collar portion includes an external surface that is
radially outboard of said skewer shaft.
26. A quick release hub assembly according to claim 22, wherein
said quick release skewer assembly includes a second collar portion
that extends axially inboard of said second gripping face and
wherein said second collar portion includes locating geometry to
provide a radially positioning alignment with said second mounting
portion.
27. A quick release hub assembly according to claim 22, wherein
said first mounting element includes an open slot and wherein said
open slot provides radial positioning alignment with said quick
release assembly.
28. A quick release hub assembly according to claim 22, wherein
said first collar portion constitutes a portion of said first
skewer element.
29. A quick release hub assembly according to claim 22, wherein
said first collar portion constitutes a portion of said skewer
shaft.
30. A quick release hub assembly according to claim 22, wherein
said first collar portion has an axially fixed relation to said
first gripping face.
31. A quick release hub assembly according to claim 22, wherein
said first collar portion is axially displaceable relative to said
first gripping face.
32. A quick release hub assembly according to claim 31, including
means to selectively displace said first gripping face relative to
said first collar portion.
33. A quick release hub assembly according to claim 32, wherein the
means to provide said selective control is a cam and follower
engagement.
34. A quick release hub assembly according to claim 22, wherein
said first collar portion is in an axially fixed relation to said
skewer shaft.
35. A quick release hub assembly according to claim 22, wherein
said first collar portion is axially displaceable relative to said
first skewer shaft.
36. A quick release hub assembly according to claim 22, wherein
said first collar portion is integral with said first skewer
element.
37. A quick release hub assembly according to claim 22, wherein
said first collar portion is in a separate component from said
first skewer element.
38. A quick release hub assembly according to claim 22, wherein
said quick release skewer assembly includes piloting geometry for
radial alignment of the quick release skewer assembly relative to
said axle element.
39. A quick release hub assembly according to claim 38, wherein
said piloting geometry is located in said first skewer element.
40. A quick release hub assembly according to claim 38, wherein
said piloting geometry is located in said skewer shaft.
41. A quick release hub assembly according to claim 38, wherein
said piloting geometry is a circular cylindrical collar.
42. A quick release hub assembly according to claim 41, wherein
said circular cylindrical collar is mated to a corresponding
circular cylindrical recess in said opening of said axle
element.
43. A quick release hub assembly according to claim 22, including a
spring positioned between said axle element and said a quick
release skewer assembly, wherein said spring serves to bias said
first gripping face toward an axially distal orientation relative
to said first outer face.
44. A quick release hub assembly according to claim 43, wherein
said axially extending opening includes end-stop geometry to bear
against a first end of said compression spring and said first
skewer element includes end-stop geometry to bear against a second
end of said compression spring, said compression spring.
45. A quick release hub assembly according to claim 22, wherein at
least a portion of said first skewer element includes a configured
surface to facilitate manual manipulation.
46. A quick release hub assembly according to claim 22, wherein at
least a portion of said skewer shaft has across sectional area
between 10 and 35 square millimeters.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application claims priority of U.S. provisional patent
application 61/395,509, filed May 14, 2010, and entitled "QUICK
RELEASE HUB ASSEMBLY".
BACKGROUND
[0002] 1. Field of the Invention
[0003] The present invention relates to the quick release hub
assembly that facilitates the connection between axle of a vehicle
wheel and the frame to which the vehicle wheel is mounted.
[0004] 2. Discussion of Prior Art
[0005] Heretofore, the prior art quick release skewer nut is a
large and bulky component with correspondingly high aerodynamic
drag, heavy weight and poor aesthetics. Prior art skewer nuts
generally project very far from the outer face of the dropout,
usually projecting a distance of 0.6'' to 0.8''. For proper
function of the skewer nut, it must maintain a large helical thread
engagement length with the skewer shaft, particularly if the skewer
nut is made of a lighter softer material such as aluminum. Since
this thread engagement is conventionally outboard of the outer face
of the dropout, in order to maintain the requisite thread
engagement, the nut has to project this large distance. Further,
since the skewer nut is so tall, the skewer nut is also rather
heavy. Still further, since this skewer nut projects so far from
the dropout, it has lends poor aesthetics and increased aerodynamic
drag to the hub assembly.
[0006] Similarly, the connection between the lever pivot of the
clamping assembly and the skewer shaft is commonly outboard of the
outer face of the dropout. Similar to the skewer nut, this requires
that the clamping assembly project very far from the dropout. Thus,
it may be seen that the conventional clamping assembly is also
heavy, with poor aesthetics and increased aerodynamic drag.
SUMMARY OF THE INVENTION
Objects and Advantages
[0007] In accordance with the present invention, it has now been
found that the forgoing objects and advantages may be readily
obtained.
[0008] It is an objection of the invention to provide a quick
release hub assembly that is low profile, aesthetically pleasing,
aerodynamic and lightweight. A further object of the invention is
its compatibility with existing frame designs.
[0009] Since an engagement between the skewer nut and the skewer
shaft no longer needs to be axially outboard of the dropout, the
present invention permits the design of a low profile skewer nut
that has minimal outboard protrusion from its associated outer
dropout face. The resulting design results in a more compact
assembly that is more aesthetically pleasing. Further, this minimal
outboard protrusion results in reduced aerodynamic drag as compared
to prior art designs.
[0010] The present invention also permits a longitudinal engagement
between the skewer nut (i.e. piloting nut) and/or the clamping
assembly and the skewer shaft. This longitudinal engagement may be
axially coincident and/or axially inboard of the dropout. The
longitudinal length of this engagement may then be substantial
enough to support the clamping loads in the skewer assembly. This
is in contrast to prior art quick release skewer assemblies that
rely on a longitudinal (i.e. threaded) engagement that is axially
outboard of the dropout.
[0011] Still further, in comparison with prior art designs, the
conventional axle stub is eliminated, the skewer shaft may be
shortened and the skewer nut has reduced dimension. Thus, the
compact design of the present invention may result in a result in
reduced overall weight of the assembly, which is a very important
benefit to cyclists.
[0012] Yet further, the present invention does not necessarily
require modification to the frame and dropout design, which has the
added benefit of permitting the frame to have compatibility both
with the present invention and with conventional quick release
hubs. This is important as the present invention may be retrofitted
to the vast installed base of preexisting conventional bicycle
frames and does not require frame makers to make design
modifications to new bicycle frames.
[0013] Further objects and advantages of my invention will become
apparent from considering the drawings and ensuing description.
BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The present invention will be more readily understandable
from a consideration of the accompanying drawings, wherein:
[0015] FIG. 1 is a perspective view schematically illustrating the
general configuration of a prior art vehicle wheel as applied to a
bicycle wheel;
[0016] FIG. 2a is an exploded perspective view of a prior art hub
assembly, including the dropouts of a frame and a conventional
quick release skewer assembly;
[0017] FIGS. 2b-d are exploded perspective views of the embodiment
of FIG. 2a, showing the progressive sequential steps involved in
mounting the hub assembly to the frame;
[0018] FIG. 2b shows the quick release skewer assembly
pre-assembled to the hub assembly prior to its mounting in the
dropouts;
[0019] FIG. 2c shows the hub assembly positioned between the frame
dropouts, with the quick release skewer assembly loosely adjusted
and the lever in the "open" position;
[0020] FIG. 2d shows the hub assembly positioned between the frame
dropouts with the quick release skewer assembly properly adjusted
and the lever in the "closed" position to clamp the hub assembly
with the dropouts;
[0021] FIGS. 2e-h are axial cross-sectional views of the embodiment
of FIG. 2a, showing the progressive sequential steps involved in
mounting the hub assembly to the frame;
[0022] FIG. 2e is an exploded view showing the hub assembly and
quick release skewer assembly prior to their assembly;
[0023] FIG. 2f shows a sequence identical to FIG. 2b, with the
quick release skewer assembly pre-assembled to the hub assembly
prior to its mounting in the dropouts;
[0024] FIG. 2g shows a sequence identical to FIG. 2c, with the hub
assembly positioned between the frame dropouts and with the quick
release skewer assembly loosely adjusted and the lever in the
"open" position;
[0025] FIG. 2h shows a sequence identical to FIG. 2d, with the hub
assembly positioned between the frame dropouts and with the quick
release skewer assembly properly adjusted and the lever in the
"closed" position to clamp the hub assembly with the dropouts;
[0026] FIG. 3a is an is an exploded perspective view of a first
embodiment of the present invention, showing the hub assembly and
including the dropouts of a frame and the quick release skewer
assembly;
[0027] FIGS. 3b-d are exploded perspective views of the embodiment
of FIG. 3a, showing the progressive sequential steps involved in
mounting the hub assembly to the frame;
[0028] FIG. 3b shows the quick release skewer assembly
pre-assembled to the hub assembly prior to its mounting in the
dropouts;
[0029] FIG. 3c shows the hub assembly positioned between the frame
dropouts, with the quick release skewer assembly loosely adjusted
and the lever in the "open" position;
[0030] FIG. 3d shows the hub assembly positioned between the frame
dropouts with the quick release skewer assembly properly adjusted
and the lever in the "closed" position to clamp the hub assembly
with the dropouts;
[0031] FIGS. 3e-h are axial cross-sectional views of the embodiment
of FIG. 3a, showing the progressive sequential steps involved in
mounting the hub assembly to the frame;
[0032] FIG. 3e is an exploded view showing the hub assembly and
quick release skewer assembly prior to their assembly with the
clamping assembly in partial cross section;
[0033] FIG. 3f shows a sequence identical to FIG. 3b, with the
quick release skewer assembly pre-assembled to the hub assembly
prior to its mounting in the dropouts;
[0034] FIG. 3g shows a sequence identical to FIG. 3c, with the hub
assembly positioned between the frame dropouts and with the quick
release skewer assembly loosely adjusted and the lever in the
"open" position;
[0035] FIG. 3h shows a sequence identical to FIG. 3d, with the
clamping assembly shown without cross section, with the hub
assembly positioned between the frame dropouts and with the quick
release skewer assembly properly adjusted and the lever in the
"closed" position to clamp the hub assembly with the dropouts;
[0036] FIG. 4 is an axial cross-sectional view of a second
embodiment of the present invention, showing a quick release skewer
assembly with two clamping assemblies;
[0037] FIG. 5 is an axial cross-sectional view of a third
embodiment of the present invention, showing a quick release skewer
assembly with a threadably adjustable engagement between the skewer
shaft and the clamping assembly;
[0038] FIG. 6 is an axial cross-sectional view of a fourth
embodiment of the present invention, showing a quick release skewer
assembly without a cam actuated clamping assembly and with a
threadable engagement to provide clamping pressure to clamp the
dropouts;
[0039] FIG. 7a is a partial axial cross-sectional exploded view of
a fifth embodiment of the present invention, showing piloting nut
with a stepped collar portion that has larger diameter geometry to
provide locating alignment with the dropout and smaller diameter
geometry for piloting with the axle assembly;
[0040] FIG. 7b is a partial axial cross-sectional view of the
embodiment of FIG. 7a, showing the piloting nut as assembled with
the dropouts and hub assembly;
[0041] FIG. 8a is a partial axial cross-sectional exploded view of
a sixth embodiment of the present invention, showing a collar
portion with geometry to provide locating alignment with the
dropout and with the skewer shaft providing piloting with the axle
assembly, where the collar portion does not engage the axle
cap;
[0042] FIG. 8b is a partial axial cross-sectional view of the
embodiment of FIG. 8a, showing the piloting nut as assembled with
the dropouts and hub assembly;
[0043] FIG. 9 is a partial axial cross-sectional view of a seventh
embodiment of the present invention, showing the clamping assembly
and skewer shaft anchored to the axle assembly;
[0044] FIG. 10a is a partial axial cross-sectional exploded view of
an eighth embodiment of the present invention, showing a two-piece
piloting nut prior to assembly with the dropouts and hub
assembly;
[0045] FIG. 10b is a partial axial cross-sectional view of the
embodiment of FIG. 10a, showing a two-piece piloting nut as
assembled with the dropouts and hub assembly;
[0046] FIG. 11a is a partial axial cross-sectional exploded view of
an ninth embodiment of the present invention, illustrating an
externally threaded piloting nut and an internally threaded skewer
shaft, shown prior to assembly with the dropouts and hub
assembly;
[0047] FIG. 11b is a partial axial cross-sectional view of the
embodiment of FIG. 11a, showing the externally threaded piloting
nut threadably engaged to the internally threaded skewer shaft, as
assembled with the dropouts and hub assembly, with radially
locating alignment of the dropout provided by both the piloting nut
and the skewer shaft;
[0048] FIG. 12 is a partial axial cross-sectional view of an ninth
embodiment of the present invention, showing the externally
threaded piloting nut threadably engaged to an internally threaded
skewer shaft, as assembled with the dropouts and hub assembly, with
radially locating alignment of the dropout provided by the skewer
shaft.
DETAILED DESCRIPTION OF THE INVENTION
[0049] FIG. 1 describes the basic configuration of an exemplary
prior art vehicle wheel, in particular, a bicycle wheel 1, as well
as a description of the direction conventions used throughout this
disclosure. For clarity, the frame and the quick release skewer
assembly are not shown in this figure. The hub shell 14 is
rotatable about the axle 9 and includes at least two axially spaced
hub flanges 16, each of which include a means for connecting with
the spokes 2. Axle 9 includes end faces 11a and 11b that define the
spacing of its mounting with the frame (not shown). The axial axis
28 is the axial centerline of rotation of the bicycle wheel 1. The
hub flange 16 may be contiguous with the hub shell 14 or it may be
separately formed and assembled to the hub body 12 portion of the
hub shell 14. The spokes 2 are affixed to the hub flange 16 at
their first end 4 and extend to attach the rim 8 at their second
end 6. The tire 10 is fitted to the outer periphery of the rim 8.
The wheel of FIG. 1 is generic and may be of tension-spoke or
compression-spoke design.
[0050] The axial direction 92 is any direction parallel with the
axial axis 28. The radial direction 93 is a direction generally
perpendicular to the axial direction 92 and extending generally
from the axial axis 28 radially outwardly toward the rim 8. The
tangential direction 94 is a direction generally tangent to the rim
at a given radius. The circumferential direction 95 is a
cylindrical vector that wraps around the axial axis 28 at a given
radius. A radial plane 96 is a plane perpendicular to the axial
axis 28 that extends in a generally radial direction at a given
axial intercept. An axial plane 97 is a plane that is generally
parallel to the axial axis. An axially inboard (or inward)
orientation is an orientation that is axially proximal to the axial
midpoint between the two end faces 11a and 11b. Conversely, an
axially outboard (or outward) orientation is an orientation that is
axially distal to the axial midpoint between the two end faces 11a
and 11b. A radially inboard orientation is an orientation that is
radially proximal to the axial axis 28 and a radially outboard
orientation is an orientation that is radially distal to the axial
axis 28. An axially inwardly facing surface is a surface that faces
toward the axial midpoint between the two end faces 11a and 11b.
Conversely, an axially outwardly fading surface is a surface that
faces away from the axial midpoint between the two end faces 11a
and 11b.
[0051] While it is most common for the hub shell 14 to rotate about
a fixed axle 9, there are some cases where it is desirable to
permit the axle 9 to be fixed with the wheel 1 such as the case
where the wheel 1 is driven by the axle 9.
[0052] For general definition purposes herein, an "integral"
joinder is one that is integrated and may not be easily
disassembled at the service temperature without damaging at least
one of the components that are joined or is difficult to
disassemble or is otherwise not meant to be disassembled. This
integral joinder involves a joining interface directly between two
components. This joining interface is often a welded or adhered
interface or some other interface where the two joining surfaces
are solidly joined to each other to create a unified structure.
Preferably this joining interface is a surface interface, rather
than a point interface. The integral joinder is in contrast to a
fastened joinder, where such a fastened joinder relies solely on a
mechanically interlocked engagement to secure or connect the two
components to each other. The term "integral" refers to two
portions that are unitary, monolithic and/or integrally joined.
Further, when two portions are considered "integral" with each
other, they may be integrally joined or may be monolithic or
otherwise combined as a singular element.
[0053] FIGS. 2a-h show a typical prior art quick release hub
assembly 30, with dropouts 32a and 32b and quick release skewer
assembly 34. The dropouts 32a and 32b may be considered mounting
portions and constitute the portion of the frame (not shown) to
which the hub assembly 30 is mounted or connected. Dropout 32a
includes open slot 36a, axially inboard face 38a, and axially
outboard face 40a. Similarly, dropout 32b includes open slot 36b,
axially inboard face 38b, and axially outboard face 40b. Inboard
faces 38a and 38b are axially opposed and face each other, while
outer faces 40a and 40b are axially opposed and face away from each
other. The dropouts 32a and 32b shown here are more typical of the
front dropouts of a bicycle frame, but the rear dropouts are
similar in design and it is understood that this design is
representative of a wide range of dropout designs, either
conventional or unconventional.
[0054] The hub assembly 30 includes an axle assembly 44 and a hub
shell 14 and hub flanges 16a and 16b. In this case, the axle
assembly 44 is generally stationary and fixed to the frame of the
bicycle, while the hub shell 14 is rotatable about the axle
assembly 44 by means of bearing assemblies (visible in FIGS. 2e-h)
about axial axis 28. The hub shell 14 includes and two hub flanges
16a and 16b that are adapted to connect with the inner ends of
spokes (not shown). The axle assembly 44 includes axlecaps 42a and
42b. Axlecap 42a includes outer face 46a, axle stub 48a and axially
extending through hole 50a. Similarly, axlecap 42b includes outer
face 46b, axle stub 48b and axially extending through hole 50b.
Outer faces 46a and 46b are generally axially opposed and face away
from each other. Holes 50a and 50b constitute the exposed openings
of a continuous axial hole that extends through the axle assembly
44 to accept the skewer shaft 52 of the quick release skewer
assembly 34.
[0055] The quick release skewer assembly 34 includes skewer shaft
52, adjusting nut 62, cam-actuated clamping assembly 58 and springs
80a and 80b. Skewer shaft 52 includes a male threaded portion 54 at
its adjustable end 56 and is fixed to the barrel nut 74 of the
clamping assembly 58 at its clamping end 60. Springs 80a and 80b
are compression springs, commonly in conical configuration, which
permits the coils to overlap each other upon compression. Adjusting
nut 62 includes an internally threaded hole 64 to threadably mate
with threaded portion 54, a knurled surface 66 to facilitate its
manual manipulation and an axially inward-facing gripping face 68
to bear against the outer face 40a of dropout 32a. Clamping
assembly 58 includes a lever 70 with a cam surface 72 that rotates
about a barrel nut 74 and a follower bushing 76 with a follower
surface 77 and an axially inward-facing gripping face 78. As the
lever 70 is rotated about the barrel nut 74, the cam surface 72
cams against the follower surface 77, causing the follower bushing
76 to be selectively displaced in the axial direction such that the
grip face 78 is axially moveable relative to the barrel nut 74 and
its associated skewer shaft 52. Thus, it may be seen that the quick
release skewer assembly 34 has two modes to adjust the axial
separation of gripping faces 68 and 78: (i) the threadable
engagement between threaded portion 54 and threaded hole 64 and
(ii) the camming interface between the cam surface 72 and follower
surface 77.
[0056] FIG. 2a shows the components of the hub assembly 30, quick
release skewer assembly 34, and dropouts 32a and 32b in exploded
view for clarity. FIG. 2b shows the quick release skewer assembly
34 as pre-assembled to the hub assembly 30. Please refer to FIGS.
2e-h for items described but not otherwise shown in FIGS. 2a-d. The
skewer shaft 52 is first passed through the spring 80b and through
hole 50b such that its adjustable end 56 extends through hole 50a.
The spring 80a is then assembled over the exposed adjustable end 56
of skewer shaft 52 and adjusting nut 62 is loosely threaded onto
the exposed end of skewer shaft 52, with threaded hole 64
threadably engaged with threaded portion 54. The hub assembly 30 is
aligned with dropouts 32a and 32b such that inboard face 38a is
axially aligned with outer face 46a and inboard face 38b is axially
aligned with outer face 46b. The lever 70 is moved in direction 82
into the "open" position, such that the cam interface between cam
surface 72 and follower bushing 76 is in the retracted position to
provide maximum axial separation between gripping faces 68 and 78.
Springs 80a and 80b serve to bias the adjusting nut 62 and the
follower bushing 76 in their axially separated and spread position
relative to outer faces 46a and 46b respectively and to maintain an
open gap therebetween.
[0057] FIG. 2c shows the hub assembly 30 as pre-assembled and
positioned within the dropouts 32a and 32b. Axle stubs 48a and 48b
are now nested within slots 36a and 36b respectively to provide
radial positioning alignment between the hub assembly 30 and the
dropouts 32a and 32b. Also, inboard faces 38a and 38b are now
loosely contacting outer faces 46a and 46b respectively. The
adjusting nut 62 is then adjusted relative to the skewer shaft 52
by means of the threadable engagement between threaded portion 54
and threaded hole 64 such that the axial separation between
gripping faces 68 and 78 is set to the desired distance. The lever
70 is still shown in the "open" position.
[0058] Next, as shown in FIG. 2d, the lever 70 is moved in
direction 84 into the "closed" position, such that the cam
interface between cam surface 72 and follower surface 77 of the
follower bushing 76 is in the extended position to bias gripping
faces 68 and 78 axially toward each other via the skewer shaft 52.
Gripping face 68 is thereby pressed and clamped against outboard
face 40a, and inboard face 38a is also pressed and clamped against
outer face 46a. Simultaneously, gripping face 78 is now pressed and
clamped against outboard face 40b, and inboard face 38b is also
pressed and clamped against outer face 46b. Thus, dropout 32a is
now sandwiched and clamped between gripping face 68 and outer face
46a and dropout 32b is now sandwiched and clamped between gripping
face 78 and outer face 46b. The hub assembly 30 is now firmly
assembled to both dropouts 32a and 32b.
[0059] FIG. 2e corresponds to FIG. 2a and shows the hub assembly 30
and skewer assembly 34 in cross section for further clarity. It is
shown that the axle assembly 44 is made up of axlecaps 42a and 42b
and axle 43. Hub shell 14 is rotatable about the axle assembly 44
via bearing assemblies 45a and 45b.
[0060] FIG. 2f corresponds to FIG. 2b and shows the hub assembly
30, skewer assembly 34, and dropouts in cross section for further
clarity. Dropouts 32a and 32b have axial thickness 33a and 33b
respectively. Similarly, gap 86a exists between gripping face 68
and outer face 46a and gap 86b exists between gripping face 78 and
outer face 46b. In this figure, with the lever 70 in the "open"
position, gaps 86a and 86b are shown in their open and expanded
position such that gap 86a is greater than thickness 33a and gap
86b is greater than thickness 33b.
[0061] FIG. 2g corresponds to FIG. 2c and shows the hub assembly
30, skewer assembly 34, and dropouts in cross section for further
clarity. Axle stubs 48a and 48b are now nested within slots 36a and
36b respectively to provide radial positioning alignment between
the hub assembly 30 and the dropouts 32a and 32b. Lever 70 is still
in the "open" position and inboard faces 38a and 38b are now
loosely contacting outer faces 46a and 46b respectively. Also axial
clearance exists between gripping face 68 and outboard face 40a and
between gripping face 78 and outboard face 40b.
[0062] FIG. 2h corresponds to FIG. 2d and shows the hub assembly
30, skewer assembly 34, and dropouts in cross section for further
clarity. Lever 70 is now moved in direction 84 into the "closed"
position such that cam surface 72 cams against follower surface 77
to displace follower bushing 76 in direction 87b and adjusting nut
62 in direction 87a (by means of skewer shaft 52). Gaps 86a and 86b
are thus reduced such that gripping face 68 is now pressed and
clamped against outboard face 40a, and inboard face 38a is also
pressed and clamped against outer face 46a. Simultaneously,
gripping face 78 is now pressed and clamped against outboard face
40b, and inboard face 38b is also pressed and clamped against outer
face 46b. Thus, dropout 32a is now sandwiched and clamped between
gripping face 68 and outboard face 40a and dropout 32b is now
sandwiched and clamped between gripping face 78 and outboard face
40b.
[0063] It should be noted that the threaded engagement between the
threaded portion 54 of the skewer shaft 52 and the threaded hole 64
of the adjusting nut 62 is located entirely axially outboard of the
outboard surface 40a of the dropout 32a. A certain minimum thread
engagement length 88 is necessary to prevent stripping and/or
damage to this threaded engagement under clamping load. Since this
thread engagement length 88 is located outboard of the outboard
surface 40a, the axial width 90 of the adjusting nut 62 must be
substantial and, at minimum, correspond to the thread engagement
length 88. Thus, with such prior art designs, the width 90 must
protrude from the outboard surface 40a by a large dimension, which
is typically around 20 mm, which results in increased weight and
aerodynamic drag. Further, this bulky protrusion is aesthetically
unappealing.
[0064] It should also be noted that the radial locating and
alignment of the hub assembly 30 and quick release skewer assembly
34 is provided by the nested radial engagement between the axle
stubs 48a and 48b and the slots 36a and 36b respectively. These
axle stubs 48a and 48b are an integral part of the axle assembly 44
and extend axially outwardly from their respective outer faces 46a
and 46b. It is noted that none of the components of the quick
release skewer assembly 34 provide such radial locating and
alignment means.
[0065] FIGS. 3a-h show a first embodiment of the present invention
with quick release hub assembly 130, dropouts 32a and 32b, and
quick release skewer assembly 134. The dropouts 32a and 32b are
identical with those of FIGS. 2a-h and constitute the portion of
the frame (not shown) to which the hub assembly 30 is mounted or
connected. Dropout 32a includes open slot 36a, inboard face 38a,
and outboard face 40a. Similarly, dropout 32b includes open slot
36b, inboard face 38b, and outboard face 40b. Inboard faces 38a and
38b are axially inwardly opposed and face each other, while outer
faces 40a and 40b are axially outwardly opposed and face away from
each other. The dropouts 32a and 32b shown here are more typical of
the front dropouts of a bicycle frame, but the rear dropouts are
similar in design and it is understood that this design is merely
representative of a wide range of dropout designs, either
conventional or unconventional.
[0066] The hub assembly 130 includes an axle assembly 144 and a hub
shell 14 and hub flanges 16a and 16b. In this case, the axle
assembly 144 is generally stationary and fixed to the frame of the
bicycle, while the hub shell 14 is rotatable about the axle
assembly 144 by means of bearing assemblies (visible in FIGS. 3e-h)
about axial axis 28. The hub shell 14 includes and two hub flanges
16a and 16b that are adapted to connect with the inner ends of
spokes (not shown). The axle assembly 144 includes axlecaps 142a
and 142b, which each include outer faces 146a and 146b
respectively. Outer faces 146a and 146b are generally axially
opposed and face away from each other. Axlecaps 142a and 142b also
include cylindrical recesses or counterbores 148a and 148b and
holes 150a and 150b (visible in FIGS. 3e-h) respectively, with
respective shoulders 147a and 147b therebetween. Axle 143 is hollow
and includes axle bore 149. Counterbores 148a and 148b and holes
150a and 150b and axle bore 149 constitute a continuous axial
passage or opening that extends through the axle assembly 144.
Counterbores 148a and 148b are sized to accept the piloting nut 162
and pilot shaft 174 respectively. Holes 150a and 150b are sized to
accept the skewer shaft 152 of the quick release skewer assembly
134.
[0067] The quick release skewer assembly 134 includes skewer shaft
152, piloting nut 162, cam-actuated clamping assembly 158 and
compression springs 180a and 180b. Skewer shaft 152 includes a male
threaded portion 154 at its adjustable end 156 and is fixed to the
pilot shaft 174 of the clamping assembly 158 at its clamping end
160. Piloting nut 162 consists of an enlarged head portion 163, an
axially extending cylindrical collar portion 165, end face 167, and
internally threaded hole 164. It is noted that threaded hole 164 is
shown as a blind hole, which may be preferable to provide a clean
external appearance in comparison with a through hole, which may
alternatively be substituted. The enlarged head portion 163
includes an axially inward-facing gripping face 168 to bear against
the outer face 40a of dropout 32a and a circumferential configured
surface 166, consisting of a series of circumferentially
alternating recessed surfaces and raised surfaces around its
perimeter, to facilitate its manual manipulation. The outside
diameter of collar portion 165 is sized to provide radial
positioning alignment between the hub assembly 130 and the dropout
32a when it is nested within slot 36a. In this respect, the collar
portion functions much the same as axle stub 48a of FIGS. 2a-h.
Further, the outside diameter of collar portion 165 is sized to
provide a locating clearance fit with the counterbore 148a, such
that when the collar portion 165 is axially overlapped and piloted
to provide radial locating alignment with the counterbore 148a, the
collar portion 165 may now provide radial positioning alignment
with both the dropout 32a and the axlecap 142a.
[0068] Clamping assembly 158 includes a lever 170 with a cam
surface 172 that rotates about the pilot shaft 174 via pivot shaft
175 and a follower bushing 176 with a follower surface 177 and an
axially inboard facing gripping face 178. Pilot shaft 174 is
threadably locked and axially fixed to the clamping end 160 of the
skewer shaft 152 as shown and includes cylindrical collar portion
179 whose outside diameter is sized to provide radial positioning
locating alignment between the hub assembly 130 and the dropout 32b
when it is nested within slot 36b. In this respect, the collar
portion 179 functions much the same as axle stub 48b of FIGS. 2a-h.
Pilot shaft 174 also includes end face 181. It is noted that a
portion of the threaded engagement between the skewer shaft 152 and
the pilot shaft 174 extends to be axially inboard of the
corresponding gripping face 178. Further, the outside diameter of
collar portion 179 is sized to provide a locating clearance fit
with the counterbore 148b, such that when the collar portion 179 is
axially overlapped and piloted to provide radial locating alignment
with the counterbore 148b, the collar portion 179 may now provide
radial positioning alignment with both the dropout 32a and the
axlecap 142b. Compression springs 180a and 180b are sized such that
their outside diameter has a radial clearance fit with counterbores
148a and 148b respectively and their inside diameters are sized to
have a radial clearance fit with the skewer shaft 152. In this
embodiment, it is noted that collar portion 165 of the piloting nut
162 is in fixed relation to its associated gripping face 168 and
pilot shaft 174 is axially displaceable relative to its associated
gripping face 178.
[0069] As the lever 170 is rotated about the pivot shaft 175, the
cam surface 172 cams against the follower surface 177, causing the
follower bushing 176 to be selectively displaced in the axial
direction such that the grip face 178 is axially moveable relative
to the pilot shaft 174 and its associated skewer shaft 152. Thus,
it may be seen that the quick release skewer assembly 134 has two
modes to adjust the axial separation of gripping faces 168 and 178:
(i) the threadable engagement between threaded portion 154 and
threaded hole 164 and (ii) the camming interface between the cam
surface 172 and follower surface 177.
[0070] FIG. 3a shows the components of the hub assembly 130, quick
release skewer assembly 134, and dropouts 32a and 32b in exploded
view for clarity. Next, FIG. 3b shows the quick release skewer
assembly 134 as pre-assembled to the hub assembly 130. Please refer
to FIGS. 3e-h for items described but not otherwise shown in FIGS.
3a-d. The skewer shaft 152 is first passed through the spring 180b
and through counterbores 148a and 148b, axle bore 149, and holes
150a and 150b such that its threaded portion 154 extends within
counterbore 148a. The spring 180a is assembled over the adjustable
end 156 of skewer shaft 152 and nested within counterbore 148a.
Piloting nut 162 is then loosely threaded onto the threaded portion
154 of skewer shaft 152, with threaded hole 164 threadably engaged
with threaded portion 154. It is noted that a portion of the
threaded engagement between the threaded portion 154 and the
threaded hole 164 extends to be axially inboard of the
corresponding gripping face 168. Collar portion 165 is now piloted
and axially overlapping within counterbore 148a and collar portion
179 is now piloted and axially overlapping within counterbore 148b.
The hub assembly 130 is then axially aligned with dropouts 32a and
32b such that inboard face 38a is aligned with outer face 146a and
inboard face 38b is aligned with outer face 146b. The lever 170 is
moved in direction 182 into the "open" or unclamped position, such
that the cam interface between cam surface 172 and follower bushing
176 is in the retracted position to provide maximum axial
separation between gripping faces 168 and 178.
[0071] Shoulders 147a and 147b and end faces 167 and 181 serve as
end-stops to bear against corresponding compression springs 180a
and 180b. Spring 180a is axially sandwiched between the end face
167 of the collar portion 165 and the shoulder 147a of the axle
assembly 144 and spring 180b is axially sandwiched between the end
face 181 of the pilot shaft 174 and the shoulder 147b of the axle
assembly 144 (as clearly described in FIGS. 3f-h). Springs 180a and
180b are shown to bear against respective end faces 167 and 181 and
shoulders 147a and 147b and serve to bias the piloting nut 162 and
the follower bushing 176 toward their axially separated and spread
position relative to outer faces 146a and 146b respectively and to
maintain expanded or open gaps 186a and 186b (as shown in FIG. 30
therebetween. As an alternative to using two springs 180a and 180b,
only a single spring (180a or 180b) to maintain expanded or open
gaps (186a and/or 186b) and/or to bias the piloting nut 162 and the
follower bushing 176 toward their axially separated and spread
position relative to outer faces 146a and 146b.
[0072] Next, FIG. 3c shows the hub assembly 130 as pre-assembled
and positioned within the dropouts 32a and 32b. Collar portion 165
and pilot shaft 174 are assembled to dropouts 32a and 32b in a
generally radial direction and introduced through open slots 36a
and 36b respectively in the conventional manner. Collar portion 165
and pilot shaft 174 are now nested within corresponding slots 36a
and 36b and piloted within counterbores 148a and 148b respectively
to provide radial positional alignment between the hub assembly 130
and the dropouts 32a and 32b. Also, inboard faces 38a and 38b are
now loosely contacting faces 146a and 146b respectively. The lever
170 is still shown in the "open" position. The piloting nut 162 is
then threadably adjusted relative to the skewer shaft 152 by means
of the threadable engagement between threaded portion 154 and
threaded hole 164 such that the axial separation between gripping
faces 168 and 178 is set to the desired distance.
[0073] Next, as shown in FIG. 3d, the lever 170 is selectively
moved in direction 184 into the "closed" or clamped position, such
that the cam interface between cam surface 172 and follower surface
177 places the follower bushing 176 in an extended position such
that gripping faces 168 and 178 are axially contracted and moved
toward each other via the skewer shaft 152. Gripping face 168 is
now pressed and clamped against outboard face 40a. This causes the
frame (not shown) to flex slightly, allowing dropout 32a to be
displaced such that inboard face 38a is also pressed and clamped
against outer face 146a. Simultaneously, gripping face 178 is now
pressed and clamped against outboard face 40b, and inboard face 38b
is also pressed and clamped against outer face 146b. Thus, dropout
32a is now sandwiched and clamped between gripping face 168 and
outer face 146a and dropout 32b is now sandwiched and clamped
between gripping face 178 and outer face 146b. The hub assembly 130
is now firmly assembled to both dropouts 32a and 32b.
[0074] It should be noted that the skewer shaft 152 may serve as an
elastic tensile spring to maintain a desired clamping force between
gripping faces 168 and 178 to securely clamp the dropouts 32a and
3b. In other words, the skewer shaft 152 may stretch slightly
during clamping to add a small amount of resiliency to the system
and/or to control the clamping force. If such a resilience is
desired, it may be preferable that the skewer shaft 152 be of steel
or titanium material and sized with a cross sectional area
equivalent to approximately a 20 square millimeters in diameter
(i.e. a cross sectional area approximately between 10 and 35 square
millimeters) to provide the optimal tensile stiffness properties of
the skewer shaft 152. It should also be noted that the outside
diameters of collar portions 165 and 179 are shown to be larger
than the skewer shaft 152 such that their external surface is
radially outboard the external surface of the skewer shaft 152.
This provides the requisite locating and piloting geometry of the
collar portions 165 and 179 while still maintaining the stiffness
properties of the skewer shaft 152. It is envisioned that that the
skewer shaft 152 may alternatively be sized with an external
surface that is radially coincident with, or even radially larger
than, one or both of the collar portions 165 and 179.
[0075] Removal of the hub assembly 130 from the dropouts 3a and 32b
is essentially the reverse of the installation procedure just
described. The lever 170 is selectively moved back in direction 182
into the "open" or unclamped position, such that the cam interface
between cam surface 172 and follower surface 177 moves the follower
bushing 176 to a retracted position, such that gripping faces 168
and 178 are axially expanded and permitted to move axially apart
from each other via the skewer shaft 152. Thus the hub assembly 130
is now released and unclamped from the dropouts 32a and 32b and may
now be withdrawn from the frame (not shown).
[0076] FIG. 3e corresponds to FIG. 3a and shows the majority of the
hub assembly 130 and skewer assembly 134 in cross section for
further clarity. The clamping assembly 158 is shown in partial
cross section. It is shown that the axle assembly 144 is made up of
axlecaps 142a and 142b and axle 143 with axle bore 149. Hub shell
14 is rotatable about the axle assembly 144 via bearing assemblies
145a and 145b. It is shown that collar portion 165 has an axial
width 192 and head portion has an axial width 190. Similarly,
collar portion 179 of the pilot shaft 174 has an axial width 194
between end face 181 and gripping face 178. It is noted that width
194 corresponds to a retracted position of the clamping assembly
158, where cam surface 172 is selectively positioned (via lever
170) against follower surface 177 to permit a maximum axial width
194.
[0077] FIG. 3f corresponds to FIG. 3b and shows the hub assembly
130, skewer assembly 134, and dropouts in cross section for further
clarity. Dropouts 32a and 32b have axial thickness 33a and 33b
respectively. Similarly, gap 186a exists between gripping face 168
and outer face 146a and gap 186b exists between gripping face 178
and outer face 146b. In this figure, with the lever 170 in the
"open" position, gaps 186a and 186b are shown in their open and
expanded position. Axial width 192 is wider than axial thickness
33a of dropout 32a and also wider than gap 186a such that a portion
of this axial width 192 extends to be axially inboard of outer face
146a and that collar portion 165 is axially overlapping and piloted
within counterbore 148a. Similarly, axial width 194 is wider than
axial thickness 33b of dropout 32b and also wider than gap 186b
such that a portion of this axial width 194 extends to be axially
inboard of outer face 146b and that collar portion 179 is axially
overlapping and piloted within counterbore 148b.
[0078] FIG. 3g corresponds to FIG. 3c and shows the hub assembly
130, skewer assembly 134, and dropouts in cross section for further
clarity. Collar portions 165 and 179 are now nested within slots
36a and 36b respectively to provide radial positioning alignment
between the piloting nut 162 and dropout 32a and between the pilot
shaft 174 and dropout 32b. Collar portions 165 and 179 are also
piloted within counterbores 148a and 148b respectively to provide
radial positioning alignment between the hub assembly 130 and the
dropouts 32a and 32b. Lever 170 is still in the "open" position and
inboard faces 38a and 38b are now loosely contacting faces 146a and
146b respectively. Also, axial clearance exists between gripping
face 168 and outboard face 40a and between gripping face 78 and
outboard face 40b.
[0079] FIG. 3h corresponds to FIG. 3d and shows the hub assembly
130, skewer assembly 134, and dropouts in cross section for further
clarity. The clamping assembly 158 is shown without cross section.
Lever 170 is now shown as moved in direction 184 into the "closed"
position such that cam surface 172 cams against follower surface
177 to displace follower bushing 176 in direction 187b and piloting
nut 162 in direction 187a (by means of skewer shaft 152). It is
noted that width 194 corresponds to an extended position of the
clamping assembly 158, where cam surface 172 is selectively
positioned (via lever 170) against follower surface 177 to reduce
the axial width 194 such that griping faces 168 and 178 are brought
toward each other. Gaps 186a and 186b are thus reduced and
eliminated such that gripping face 168 is now pressed and clamped
against outboard face 40a, and inboard face 38a is also pressed and
clamped against outer face 146a. Simultaneously, gripping face 178
is now pressed and clamped against outboard face 40b, and inboard
face 38b is also pressed and clamped against outer face 146b. Thus,
dropout 32a is now sandwiched and clamped between gripping face 168
and outboard face 140a and dropout 32b is now sandwiched and
clamped between gripping face 178 and outboard face 140b. It is
also noted that the threaded engagement between the threaded hole
164 and the threaded portion 154 extends axially inboard of the
outboard face 40a of the dropout 32a.
[0080] It should be noted that, in the prior art embodiment of
FIGS. 2a-h, the radial positioning alignment of the hub assembly 30
with respect to the dropouts 32a and 32b is provided solely by
means of the axle stubs 48a and 48b of the axle assembly 44. In
contrast, the embodiment of FIGS. 3a-h show that this radial
positioning alignment of the hub assembly 130 with respect to the
dropouts 32a and 32b is provided by means located within the quick
release assembly 134, more specifically by means of the collar
portions 165 and 179. It is further noted that the axle assembly
144 does not include the axle stubs 48a and 48b of FIGS. 2a-h to
provide such radial positioning.
[0081] It may be termed that a longitudinal engagement is an
engagement that includes a continuous longitudinal engagement
interface or an engagement that includes at least two engagement
interface locations that are longitudinally spaced along the
longitudinal axis of the spoke. The threaded engagement between the
threaded portion 154 and the threaded hole 164 may be considered a
longitudinal engagement, since the helical thread extends along the
axial axis 28. It should be noted that the threaded engagement
between the threaded portion 154 of the skewer shaft 152 and the
threaded hole 164 of the adjusting nut 162 extends axially inboard
of the outboard surface 40a of the dropout 32a. A certain minimum
thread engagement length 188 is necessary to prevent stripping
and/or damage to this threaded engagement under load. Since this
thread engagement length 188 extends axially inboard of the
outboard surface 40a, the outboard width 190 of the piloting nut
162 may be significantly reduced in comparison with width 90 of
prior art designs. This minimized outboard width results in a
shallower axial protrusion relative to prior art designs for
reduced aerodynamic drag, improved aesthetics and lighter
weight.
[0082] It should also be noted that the radial locating and
alignment of the hub assembly 130 and quick release skewer assembly
134 is provided by the nested radial engagement between the collar
portions 165 and 179 and the slots 36a and 36b respectively. Collar
portion 165 of the 182 piloting nut 162 and collar portion 179 of
the clamping assembly are part of the quick release skewer assembly
134 and extend axially inwardly from their respective gripping
faces 168 and 178. Further, as shown in FIGS. 3f-h, collar portions
165 and 179 are also axially overlapping and piloted within
counterbores 148a and 148b respectively. Since the outside diameter
of collar portions 165 and 179 have a close clearance fit with
their mating counterbores 148a and 148b in the region of overlap,
this engagement controls the radial location and alignment between
the collar portions 165 and 179 and counterbores 148a and 148b.
Thus it may be seen that collar portion 165 provides radial
alignment between the axle assembly 144 (and hub assembly 130) and
dropout 32a. Similarly, collar portion 179 provides radial
alignment between the axle assembly 144 (and hub assembly 130) and
dropout 32b. In other words, collar portions 165 and 179 are
functional to provide radial locating engagement with both the axle
assembly 144 and the dropouts 32a and 32b respectively. This is in
contrast to the prior art configuration of FIGS. 2a-g which relies
the axle stubs 48a and 48b (of the axle assembly 44) to provide
radial alignment between the axle assembly 44 and the dropouts 32a
and 32b. It is also noted that the threaded engagement between the
threaded hole 164 and the threaded portion 154 extends axially
inboard of the outboard face 40a of the dropout 32a and further
extends axially inboard of the outer face 146a of the axle cap
142a.
[0083] It is noted that the embodiment of FIGS. 3a-h shows a
threaded engagement between the skewer shaft 152 and both the
piloting nut 162 and pilot shaft 174. The threaded engagement is
threadably adjustable with the piloting nut 162 to provide facility
for axial adjustment between the two and threadably fixed with the
pilot shaft 174 to serve as a nonadjustable connection.
Alternatively, both threaded engagements may be threadably
adjustable or both threaded engagements may be threadably fixed. As
a further alternative, a wide range of alternative fastening means
may be substituted for one or both of these threaded connection(s),
such as fastened or retained connections or deformed connections,
such as crimped or swaged connections.
[0084] It is noted that the piloting 162 nut may be manually
adjusted by gripping the configured surface 166 with the operator's
fingers. Alternatively, the configured surface 166 may be engaged
with a wrench or tool to facilitate adjustment. As a further
alternative, the external surface of the piloting nut 162 may be
smooth and non-configured.
[0085] It is noted that collar portions 165 and 179 are shown as
circular cylindrical collars. This allows collar portions 165 and
179 to be easily rotated or aligned about the axial axis 28
relative to slots 36a and 36b respectively and circular
counterbores 148a and 148b respectively. Alternatively, collar
portions 165 and 179 may have a noncircular external portion which
may be used to provide a rotatably keyed engagement about the axial
axis 28 relative to slots 36a and 36b respectively and/or
counterbores 148a and 148b respectively. The embodiment of FIGS.
3a-h shows a quick release skewer assembly 134 where the head
portion 163 and gripping face 168 of the piloting nut 162 is fixed
relative to the collar portion 165 and is threadably adjustable
relative to the skewer shaft 152. In contrast, the gripping face
178 of the clamping assembly 158 is selectively displaceable
relative to the collar portion 179 of the pilot shaft 174 to
include axially extended and retracted orientations. Alternatively,
as shown in FIG. 4, a second clamping assembly may be utilized in
place of the piloting nut 162. FIG. 4 shows a hub assembly 130 and
dropouts 32a and 32b that are identical to the hub assembly 130 and
dropouts 32a and 32b described in FIGS. 3a-h. The quick release
skewer assembly 202 of FIG. 4 is shown to include a skewer shaft
206, a fixed clamping assembly 204 that is axially locked to the
skewer shaft 206 and an adjustable clamping assembly 205 that is
threadably adjustable with the skewer shaft 206. Skewer shaft 206
includes two threaded portions 208a and 208b. Fixed clamping
assembly 204 is selectively axially extended by pivoting lever 214b
in direction 212b to allow its corresponding gripping face 210b to
be axially displaced relative to the collar portion 216b and skewer
shaft 206 as previously described.
[0086] Collar portion 216a of adjustable clamping assembly 205 may
be threadably adjusted relative to threaded portion 208a of skewer
shaft 206 to provide the optimal axial separation between gripping
faces 210a and 210b for proper clamping of the dropouts 32a and
32b. Adjustable clamping assembly 205 is selectively axially
extended by pivoting lever 214a in direction 212a to allow its
corresponding gripping face 210a to be axially displaced relative
to the collar portion 216a and skewer shaft 206 as previously
described. Clamping assemblies 204 and 205 are generally identical
to clamping assembly 158 as previously described in FIGS. 3a-h,
however clamping assembly 205 may be threadably adjusted to
selectively control the axial spacing between gripping face 210a
and gripping face 210b. FIG. 4 shows clamping assemblies 204 and
205 in the extended orientation with gripping face 210a pressing
dropout 32a in direction 212a and with gripping face 210b pressing
dropout 32b in direction 212b to clamp and secure the hub assembly
130 to dropouts 32a and 32b. The embodiment of FIG. 4 describes a
generic example of a quick release skewer assembly that employs two
axially extendable clamping assemblies.
[0087] The embodiment of FIG. 5 shows another alternate embodiment,
with a quick release skewer assembly 234 similar to the quick
release skewer assembly 134 of FIGS. 3a-h, including skewer shaft
228 with threaded portions 232a and 232b, piloting nut 226 with
collar portion 236 and gripping face 238, and clamping assembly 230
with piloting shaft 237 and gripping face 240. Skewer shaft 228,
piloting nut 226, and clamping assembly 230 are identical to the
corresponding components as described in FIGS. 3a-h. However, in
contrast to the embodiment of FIGS. 3a-h where piloting nut 162 is
threadably adjustable relative to skewer shaft 152 and the pilot
shaft 174 is threadably locked to the skewer shaft 152, FIG. 5
shows the internally threaded hole 235 of the piloting nut 226 as
threadably locked to the threaded portion 232a of the skewer shaft
228 and the internally threaded hole 239 of the pilot shaft 237 as
threadably adjustable relative to the threaded portion 232b of the
skewer shaft 228. Thus, the axial distance between gripping faces
238 and 240 may be threadably adjusted at the threadable interface
between the threaded hole 239 and the threaded portion 232b. Quick
release skewer assembly 234 may otherwise be substituted for quick
release skewer assembly 152 in the embodiment of FIGS. 3a-h.
[0088] The embodiment of FIG. 6 shows a further alternate
embodiment, similar to the quick release skewer assembly 134 of
FIGS. 3a-h, that eliminates the clamping assembly 158 and instead
employs a threaded engagement to clamp and secure the hub assembly
to the dropouts. Quick release skewer assembly 244 includes a
piloting nut 246 is identical to piloting nut 162, with gripping
face 247, collar portion 248 and internally threaded hole 250.
Skewer shaft 252 includes a threaded portion 254, collar portion
256, headed end 261, hex socket 262, and washer 258 with gripping
face 260. Hex socket 262 is sized to accept hex key 264, which may
be utilized to rotate the skewer shaft 252 about the axial axis 28.
Collar portion 248 has identical function to collar portion 165 and
collar portion 256 has identical function to collar portion
179.
[0089] During assembly, with quick release skewer assembly 244
substituted for quick release skewer assembly 152 in the embodiment
of FIGS. 3a-h, threaded hole 250 is threadably mated to threaded
portion 254 of the skewer shaft 252. Next, hex key 264 may be
temporarily engaged with hex socket 262 to threadably tighten the
engagement between threaded portion 254 and threaded hole 250,
which serves to axially contract gripping surfaces 247 and 260
axially inwardly toward each other to sandwich and clamp the
dropouts 32a and 32b to secure the hub assembly to the dropouts in
a manner previously described in FIGS. 3a-h. While the embodiment
of FIGS. 3a-h shows a cam-activated clamping assembly 158 where the
gripping face 178 is axially displaceable relative to the collar
portion 179, the embodiment of FIG. 6 is representative of an
alternate means to clamp and secure the hub assembly to the
dropouts, where the gripping face 260 is axially locked to the
collar portion 256. FIG. 6 also shows a threaded engagement to
selectively control the axial distance between opposing gripping
faces (246 and 260) to clamp the dropouts, in contrast to the
cam-activated clamping means described in FIGS. 3a-h.
[0090] FIGS. 7a-b describe another alternate embodiment, similar to
the embodiment of FIGS. 3a-h, that instead employs a piloting nut
with a stepped collar portion. Piloting nut 266 includes an
enlarged head portion 270, a collar portion 271, and an internally
threaded hole 276. Collar portion 271 comprises a large stepped
portion 272 with a diameter 278 to and a small stepped portion 274
with a diameter 277. Hub assembly 130 is shown in fragmentary
section view and is identical to the hub assembly of FIGS. 3a-h and
rotatable about axial axis 28. Dropout 282a is similar to dropout
32a and includes inboard face 283a, outboard face 284a and slot
285a, which is sized to receive large stepped portion 272 of
diameter 278. Internally threaded hole 276 is threadably engaged to
threaded portion 281 of the skewer shaft 280 similar to that
described in FIGS. 3a-h.
[0091] In contrast to the straight collar portion 165 of FIGS. 3a-h
that has a generally constant diameter, the stepped collar portion
266 of piloting nut 266 is stepped to have two diameters. Diameter
278 of large stepped portion 272, which is adjacent the gripping
face 268, is sized to be nested within slot 285a to provide radial
positioning alignment between the hub assembly 30 and the dropouts
285a. Diameter 277 of small stepped portion 274, which is axially
spaced from the gripping face 268, is smaller than diameter 278 and
is sized to provide a locating clearance fit with the counterbore
148a, such that when the small stepped portion 274 is axially
overlapped and piloted with the counterbore 148a, the small stepped
portion 274 may now provide radial positioning alignment with the
axlecap 142a.
[0092] FIG. 7a shows the skewer shaft 280 assembled with the hub
assembly 130 and piloting nut 266 prior to its threaded assembly
with the skewer shaft 280. FIG. 7b shows the piloting nut 266 as
threadably assembled with the skewer shaft 280 and dropout 282
clamped and sandwiched between gripping face 268 and outer face
146a in a manner similar to that described in FIGS. 3a-h. It may be
seen that large stepped portion 272 is nested in slot 285a of
dropout 282a to provide radial locating between the piloting nut
266 and the dropout 282a. Additionally, small stepped portion 274
is piloted and axially overlapped with counterbore 148a to provide
radial locating between the hub assembly 130 and the piloting nut
266. It is also noted that the threaded engagement between the
threaded hole 276 and the threaded portion 281 extends axially
inboard of the outboard face 284a of the dropout 282a and further
extends axially inboard of the outer face 146a of the axle cap
142a.
[0093] The piloting nut 266 is but one representative example of
how the collar portion may employ a multiplicity of geometries or a
variable geometry that may be optimized to interface with the
dropout and/or hub assembly. In a further alternative configuration
the small stepped portion may be located adjacent the gripping face
268 and the large stepped portion may be axially spaced from the
gripping face 268. In a yet further alternative, the collar portion
of the piloting nut may employ variable geometry, such as an
axially tapered or conical surface. In a still further alternative,
the collar portion may employ noncircular or keying geometry such
that it may be rotationally keyed (about the axial axis 28) to
engage mating noncircular or keying geometry of the axle cap. This
keyed engagement could be utilized to prevent relative rotation
(about the axial axis 28) between the collar portion and the
counterbore of the axle cap.
[0094] FIGS. 8a-b describe yet another alternate embodiment,
similar to the embodiment of FIGS. 3a-h. In place to the piloting
nut 162 of FIGS. 3a-h, FIGS. 8a-b instead employs an alignment nut
294 with a collar portion 297 that radially engages the slot 36a of
dropout 32a, but does not provide axial overlap or piloting with
the hub assembly 289. Dropout 32a is identical to that shown in
FIGS. 3a-h and includes open slot 36a, inboard face 38a, outboard
face 40a, and axial width 33a between inboard face 38a and outboard
face 40a. Hub assembly 289 is shown in fragmentary section view and
is identical to the hub assembly 30 of FIGS. 3a-h with the
exception of axle cap 288a, which includes outer face 290a and
central bore 291a. The outside diameter of skewer shaft 292 is
sized to provide a close clearance fit with central bore 291a as
shown and includes threaded portion 293. Alignment nut 294 is
similar to piloting nut 162 and includes head portion 296, collar
portion 297, gripping face 298, and internally threaded hole 300.
The axial width 302 of collar portion 297 is of somewhat smaller
dimension than axial width 33a of dropout 32a.
[0095] FIG. 8a shows the skewer shaft 292 assembled with the hub
assembly 289 and the alignment nut 294 prior to threaded assembly
with the skewer shaft 289. Threaded end 293 is shown to protrude
axially outboard from the outer face 290a. FIG. 8b shows the
threaded hole 300 of the alignment nut 294 as threadably assembled
with the threaded end 293 of the skewer shaft 289, with dropout 32a
clamped and sandwiched between gripping face 298 and outer face
290a in a manner previously described in FIGS. 3a-h. It may be seen
that collar portion 297 is nested in slot 36a of dropout 32a while
skewer shaft 289 is piloted and axially overlapping central bore
291a.
[0096] In the embodiment of FIGS. 3a-h the collar portion 165 of
the piloting nut 162 has an axial width 192 greater than the axial
width 33a of its corresponding dropout, with the collar portion 165
having axial overlap with the counterbore 148a of the axlecap 142a.
In contrast, the axial width 302 is less than the axial width 33a
of its corresponding dropout. Thus, the collar portion only
provides radial alignment by means of its nested engagement with
the slot 36a and does not have any axial overlap or piloting with
the axlecap 288a. Instead, radial alignment between the hub
assembly 289 and the dropout 32a is provided through (i) the
piloted and axially overlapping engagement between the skewer shaft
292 and central bore 291a and (ii) the axially overlapped threaded
engagement between threaded end 293 and threaded hole 295 and (iii)
the axially overlapped and radially nested engagement between the
collar portion 297 and the slot 36a of dropout 32a.
[0097] It is noted that the embodiment of FIGS. 8a-b provides a
representative example where radial alignment between the hub
assembly and the dropout may be achieved through interaction of
several different components. It is also noted that the threaded
engagement between the threaded hole 300 and the threaded portion
293 extends axially inboard of the outboard face 40a of the dropout
32a. It is further noted that the internal threaded hole 295 of the
alignment nut 294 is threaded completely through the alignment nut
294 as shown. This allows the threaded end 293 of the skewer shaft
292 to extend completely through the alignment nut 294 and even
protrude through the opposite side as shown in FIG. 8b. This in
contrast with the blind threaded hole 164 of the piloting nut 162
of FIGS. 3a-h, where the blind threaded hole 164 creates a depth
limit for its threaded engagement with the skewer shaft 152.
[0098] FIG. 9 describes a still further alternate embodiment
similar to the embodiment of FIGS. 3a-h, however the skewer shaft
312 does not extend between the two opposing gripping faces, but
instead the skewer shaft 312 is axially engaged to the axle
assembly. Dropout 32b is identical to that shown in FIGS. 3a-h and
includes open slot 36b inboard face 38b and outboard face 40b. Hub
assembly 316 is shown in fragmentary section view and is identical
to the hub assembly 130 of FIGS. 3a-h with the exception of axle
cap 306b, which includes outer face 308b, counterbore 309b and
internally threaded bore 310b.
[0099] Clamping assembly 158 is identical to that of FIGS. 3a-h and
includes a lever 170, pivot shaft 175, follower bushing 176 and an
axially inboard facing gripping face 178. Pilot shaft 174 includes
cylindrical collar portion 179 whose outside diameter is sized to
provide radial positioning alignment between the with the dropout
32b when it is nested within slot 36b and the outside diameter of
collar portion 179 is sized to provide a locating clearance fit
with the counterbore 309b, such that when the collar portion 179 is
axially overlapped and piloted with the counterbore 309b to provide
radial positioning alignment with both the dropout 32a and the
axlecap 306b. Skewer shaft 312 is threaded along its length with
external threads 314 and pilot shaft 174 is threadably engaged
locked to the skewer shaft 312 as shown. Skewer shaft 312 is also
threadably engaged to the internally threaded bore 310b of axle cap
306b. Thus, the axial distance between the outer face 308 and
gripping face 178 may be threadably adjusted via the threaded
engagement between the skewer shaft 312 and the threaded bore 310b
for proper positioning for optimized clamping of the dropout 32b
via the axial camming of the clamping assembly 158 as previously
described. In the embodiment of FIGS. 3a-h, the clamping assembly
158 serves to clamp both dropouts 32a and 32b simultaneously. In
contrast, since the skewer shaft 312 is axially engaged to the axle
cap 306b, the clamping assembly 158 only clamps the single dropout
32b. It is also noted that the threaded engagement between the
skewer shaft 312 and the pilot shaft 174 extends axially inboard of
the outboard face 40b of the dropout 32b. It is noted that the
embodiment of FIG. 9 provides a representative example where the
skewer shaft is axially engaged to the axle assembly.
[0100] It is noted that, in the embodiment of FIGS. 3a-h, the
collar portion 165 is integral and monolithic with the head portion
163, which includes gripping face 168. In contrast, the embodiment
of FIGS. 10a-b describes a yet further alternate embodiment that is
identical to the embodiment of FIGS. 3a-h, with the exception that
the piloting nut 162 is shown here as composed of two separate
components: the clamp nut 324 and the collar sleeve 318. Dropout
32a is identical to that shown in FIGS. 3a-h and includes open slot
36a inboard face 38a and outboard face 40a. Hub assembly 130 is
shown in fragmentary section view. Clamp nut 324 includes
internally threaded hole 326, gripping face 328, and alignment face
330. Collar sleeve 318 includes outside surface 319, end faces 322a
and 322b, and through bore 320, which is sized for a close
clearance fit with the skewer shaft 152. Also included are skewer
shaft 152 and spring 80a.
[0101] FIG. 10a shows the skewer shaft 152 assembled with the hub
assembly 289 and shows the clamp nut 324 and collar sleeve 318 and
spring 80a prior to threaded assembly between the clamp nut 324 and
the skewer shaft 152. Spring 80a is first assembled and nested into
counterbore 148a. Next, collar sleeve 318 is assembled into
counterbore 148a such that the spring 80a is pressed against end
face 322b to bias the collar sleeve axially outwardly. Then, the
clamp nut 324 is threaded onto the skewer shaft 152, with threaded
portion 154 threadably engaged to the threaded hole 326. End face
322a is now pressed and butted up against alignment face 330 (as
shown in FIG. 10b).
[0102] As shown in FIG. 10b, the outside surface 319 is sized to
provide radial positioning alignment with the dropout 32a when it
is nested within slot 36a. In this respect, the collar sleeve
functions much the same as axle stub 48a of FIGS. 2a-h. Further,
the outside diameter of collar sleeve 318 is sized to provide a
locating clearance fit with the counterbore 148a, such that when
the collar sleeve 318 is axially overlapped and piloted with the
counterbore 148a, the collar portion 165 may now provide radial
positioning alignment with both the dropout 32a and the axlecap
142a. The dropout 32a is clamped and sandwiched between gripping
face 328 and outer face 146a in a manner previously described.
[0103] In the embodiment of FIGS. 3a-h the collar portion 165 is
shown to be integral and/or monolithic with the piloting nut 162
and with the threaded engagement associated with the threaded hole
164 extending to axially overlap with the collar portion 165. In
contrast, the embodiment of FIGS. 10a-b shows a two-piece design
where the clamp nut 324 and collar sleeve 318 are effectively
combined to provide similar functionality to the piloting nut 162.
Further, the collar sleeve 318 is shown to have a generally smooth
through bore that does not have threaded engagement with the
threaded portion 154 of the skewer shaft. It is also noted that the
threaded engagement between the threaded hole 326 and the threaded
portion 154 does not extend axially inboard of the outboard face
40a of the dropout 32a. It is further noted that the collar sleeve
318 may be independently rotated relative to the clamp nut 324
about the axial axis 28.
[0104] It is noted that the embodiment of FIGS. 10a-b provides a
representative example where the axially clamping gripping face 328
is in a separate component from the radially locating collar sleeve
318. A wide range of alternate arrangements may be utilized. For
example, the sleeve 318 may be rotationally keyed relative to the
clamp nut 324 to provide a rotationally linked engagement between
the two. Further, the collar sleeve 318 may be axially connected to
the skewer shaft 152. Still further, the collar sleeve 318 may be
axially connected to the clamp nut 324.
[0105] FIGS. 11a-b describe another alternate embodiment, similar
to the embodiment of FIGS. 3a-h, that instead employs a piloting
nut that includes an external surface (i.e. external threads 107)
of the piloting nut 102 that engages an internal surface (i.e.
internal threads 115) of the skewer shaft 109. As shown in FIG.
11a, piloting nut 102 includes gripping face 103, collar portion
105 with shoulder 104 and an externally threaded stub 106 with
external threads 107. Skewer shaft 109 includes an enlarged collar
portion 111, an end face 116, a shoulder 117, and an internally
threaded hole 113 with internal threads 115. Hub assembly 130 is
shown in fragmentary section view and is identical to the hub
assembly of FIGS. 3a-h and rotatable about axial axis 28. Dropout
32a, as shown in FIG. 11b; is identical to that described in FIGS.
3a-h.
[0106] FIG. 11b corresponds with the sequence of FIG. 3h and shows
the hub assembly 130, with piloting nut 102 and skewer shaft 109,
as assembled and clamped to dropout 32a. The external threads 107
are threadably mated with internal threads 115 to join the piloting
nut 102 to the skewer shaft 109. Note that there exists a gap 118
between the shoulder 104 and end face 116 which indicates that the
axial location of the piloting nut 102 may be threadably adjusted
relative to the skewer shaft 109 in a manner similar to that
described previously in FIGS. 3a-h. It is also noted that collar
portion 111 is cylindrical and of the same external diameter as
collar portion 105, with both collar portions serving to
simultaneously provide radial position alignment with the slot 36a
of the dropout 32a in a manner described previously in FIGS. 3a-h.
Further, collar portion 111 is shown to be piloted within
counterbore 148a to provide radial position alignment between the
skewer shaft 109 and the hub assembly 130. Spring 180a is located
between shoulder 147a and shoulder 104 to bias the griping face 103
outwardly of the end face 146a. Thus, it may be seen that the
skewer shaft 109 itself may include geometry to provide radial
locating geometry with the hub assembly 130 and with the dropout
32a.
[0107] FIG. 12 describes another alternate embodiment, similar to
the embodiment of FIGS. 11a-b, that instead shows the skewer shaft
340 as providing radial position alignment with the dropout and
shows a non-adjustable threaded engagement between the gripping
screw 334 and the skewer shaft 340. As shown in FIG. 12, gripping
screw 334 includes gripping face 336 and an externally threaded
stub 338 with external threads 339. Skewer shaft 340 has a
generally straight cylindrical external surface 254, end face 342,
and an internally threaded hole 344 with internal threads 345. Hub
assembly 350 is shown in fragmentary section view and is similar to
the hub assembly 130 of FIGS. 3a-h and includes hub shell 14, hub
flange 16a, axle 347 with axle cap 348a, hole 352 and end face
350a. Hub shell 14 is rotatable about axle 347 and axial axis 28
via bearings 145a. Dropout 32a, as shown in FIG. 12, is identical
to that described in FIGS. 3a-h.
[0108] FIG. 12 corresponds with the sequence of FIG. 3h and shows
the hub assembly 350 as assembled and clamped to dropout 32a.
Threaded stub 338 is first threaded into threaded hole 344, with
external threads 339 threadably mated with internal threads 345,
until end face 342 is bottomed out against base surface 346, thus
axially locking the gripping screw 334 and skewer shaft 109. It is
noted that alignment portion 341 is proud of the end face 350 and
is utilized to provide radial positioning geometry with the slot
36a of the dropout 32a. Skewer shaft 340 is piloted and radially
aligned within hole 352 of the axle 347, while also permitting
axial sliding between the two. Thus, it is noted that the skewer
shaft 340 in this embodiment serves to provide a similar function
to the collar portion 165 of FIGS. 3a-h. As skewer shaft 340 is
then drawn in direction 356 relative to axle 347 (by a means
similar to that described in several other embodiments herein), the
dropout 32a is sandwiched and gripped between gripping face 336 and
end face 350a, thus securing the hub assembly 350 to the frame (not
shown).
[0109] While the skewer shaft 340 is shown here to have a
relatively constant cross section and straight cylindrical outer
surface 354, in an alternative design the cross section and outer
surface of the skewer shaft may be variable along the axial axis
28. For example, the skewer shaft may include a reduced external
dimension to pilot within axle may and an enlarged external
dimension for radial positioning location with the dropout 32a. In
another alternative example, the skewer shaft may include an
enlarged external dimension to pilot within axle may and a reduced
external dimension for radial positioning location with the dropout
32a. In a further alternative example, the outer surface 354 may be
non-circular to provide a rotationally keyed engagement with the
hole 352 or the slot 36a.
[0110] While my above description contains many specificities,
these should not be construed as limitations on the scope of the
invention, but rather as exemplifications of embodiments thereof.
For example:
[0111] The skewer shaft in most of these embodiments is shown to be
a separate component that is assembled to the piloting nut and/or
the clamping assembly. Alternatively, the skewer shaft may be
integral or monolithic with the piloting nut or the clamping
assembly.
[0112] The collar portions of the corresponding piloting nut and/or
the clamping assembly are shown here to be of generally cylindrical
for with circular outer cross-sectional perimeter. Alternatively,
the collar portions of the corresponding piloting nut and/or the
clamping assembly may have geometry with non-circular outer
cross-sectional perimeter. For example, the cross-sectional
perimeter may include flat portions to for non-rotational
engagement with the dropouts.
[0113] Most of the embodiments show at least one threadably
adjustable engagement between the skewer shaft and the piloting nut
and/or the clamping assembly to control the axial spacing with
opposing gripping faces of the quick release assembly.
Alternatively, all of the piloting nut(s) and/or the clamping
assembly(s) may be axially fixed to the skewer shaft, with no
provision for threadable adjustment. In such a case, the axial
spacing of opposing gripping faces may potentially have no
adjustment and clamping would be solely achieved by expansion of a
clamping assembly.
[0114] It is to be understood that the invention is not limited to
the illustrations described and shown herein, which are deemed to
be merely illustrative of the best modes of carrying out the
invention, and which are susceptible of modification of form, size,
arrangement of parts and details of operation. The invention rather
is intended to encompass all such modifications that are within its
spirit and scope as defined by the claims.
* * * * *